/Engine/Source/Runtime/Core/Public/Containers/UnrealString.h
Concatenate this path with given path ensuring the / character is used between them
reference to path
template<typename CharRangeType, typename [TEnableIf](API\Runtime\Core\Templates\TEnableIf)< [TIsTCharRangeNotCArray](API\Runtime\Core\Templates\TAnd)< CharRangeType >::Value >::Type *> [FString](API\Runtime\Core\Containers\FString) & operator/= ( CharRangeType && Str )